Hi KAOS,
I expect you found your Hardie family but just in case you didn't, I looked them up on Scotland's People and found them in the 1851 census. Details as follows.
Parish of Crailing Nisbet Mill Farm
Robert Hardie Head M (married) 41 Agricultural labourer born in Kelso, Roxburghshire
Jane Hardie Wife M 54 born in Bowden(?), Roxburghshire
Mary Hutchison Step daughter unmarried 24 Farm labourer born in ?---thom?, Berwickshire
Thomas Hardie Son unmarried 13 Scholar. born in Gordon, Berwickshire
Crailing is a village a few miles east of Jedburgh, in what is now the Scottish Borders but used to be known as Roxburghshire.
As your enquiry was in 2005, I would guess you already have this information or have moved on to another search. It was good to find them, anyhow! Anne